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Fitting Pistons

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  1. Standard service pistons are color-coded Red, Blue or Yellow on dome of piston. Measure piston skirt diameter at 90-degree angle to piston pin, 1.62" (42.0 mm) below piston top. Replace piston if piston diameter is not within specification. See PISTONS, PINS & RINGS  table under ENGINE SPECIFICATIONS.
  2. Measure cylinder bore at 1/2" below top of piston travel and 1/2" above bottom of piston travel. Ensure piston clearance is within specification. See PISTONS, PINS & RINGS  table.
  3. If piston clearance is not within specification, choose a selective fit piston to bring piston clearance within specification. See PISTONS, PINS & RINGS  table, for selective fit piston sizes.
  4. If piston clearance cannot be corrected using a selective fit piston, bore all cylinders to nearest oversize.
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